Question

Sort the following on the basis of reactivity toward nucleophilic addition reaction.

• A. ${\mathrm{CH}}_3\mathrm{CHO}$
• B. ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{CHO}$
• C. ${\mathrm{NO}}_2{\mathrm{CH}}_2\mathrm{CHO}$
• D. ${\mathrm{ClCH}}_2\mathrm{CHO}$

Answer 1

Order : $N{O}_{2}C{H}_{2}CHO$ > $ClC{H}_{2}CHO$ > $C{H}_{3}CHO$ > $C{H}_{3}C{H}_{2}CHO$
$N{O}_2$ has more -I effect than Cl and ethyl group has more +I effect than the methyl group.